C++ (Cpp) pvr2_ioread_stop Examples

Example #1

static int pvr2_ioread_get_buffer(struct pvr2_ioread *cp)
{
	int stat;

	while (cp->c_data_len <= cp->c_data_offs) {
		if (cp->c_buf) {
			
			stat = pvr2_buffer_queue(cp->c_buf);
			if (stat < 0) {
				
				pvr2_trace(PVR2_TRACE_DATA_FLOW,
					   "/*---TRACE_READ---*/"
					   " pvr2_ioread_read id=%p"
					   " queue_error=%d",
					   cp,stat);
				pvr2_ioread_stop(cp);
				return 0;
			}
			cp->c_buf = NULL;
			cp->c_data_ptr = NULL;
			cp->c_data_len = 0;
			cp->c_data_offs = 0;
		}
		
		cp->c_buf = pvr2_stream_get_ready_buffer(cp->stream);
		if (!cp->c_buf) break; 
		cp->c_data_len = pvr2_buffer_get_count(cp->c_buf);
		if (!cp->c_data_len) {
			
			stat = pvr2_buffer_get_status(cp->c_buf);
			if (stat < 0) {
				
				pvr2_trace(PVR2_TRACE_DATA_FLOW,
					   "/*---TRACE_READ---*/"
					   " pvr2_ioread_read id=%p"
					   " buffer_error=%d",
					   cp,stat);
				pvr2_ioread_stop(cp);
				
				return 0;
			}
			
			continue;
		}
		cp->c_data_offs = 0;
		cp->c_data_ptr = cp->buffer_storage[
			pvr2_buffer_get_id(cp->c_buf)];
	}
	return !0;
}

Example #2

File: pvrusb2-ioread.c Project: OpenStbV4l-dvb/v4l-dvb

	/* State relevant to current buffer being read */
	struct pvr2_buffer *c_buf;
	char *c_data_ptr;
	unsigned int c_data_len;
	unsigned int c_data_offs;
	struct mutex mutex;
};

static int pvr2_ioread_init(struct pvr2_ioread *cp)
{
	unsigned int idx;

	cp->stream = NULL;
	mutex_init(&cp->mutex);

	for (idx = 0; idx < BUFFER_COUNT; idx++) {
		cp->buffer_storage[idx] = kmalloc(BUFFER_SIZE,GFP_KERNEL);
		if (!(cp->buffer_storage[idx])) break;
	}

	if (idx < BUFFER_COUNT) {
		// An allocation appears to have failed
		for (idx = 0; idx < BUFFER_COUNT; idx++) {
			if (!(cp->buffer_storage[idx])) continue;
			kfree(cp->buffer_storage[idx]);
		}
		return -ENOMEM;
	}
	return 0;
}

static void pvr2_ioread_done(struct pvr2_ioread *cp)
{
	unsigned int idx;

	pvr2_ioread_setup(cp,NULL);
	for (idx = 0; idx < BUFFER_COUNT; idx++) {
		if (!(cp->buffer_storage[idx])) continue;
		kfree(cp->buffer_storage[idx]);
	}
}

struct pvr2_ioread *pvr2_ioread_create(void)
{
	struct pvr2_ioread *cp;
	cp = kzalloc(sizeof(*cp),GFP_KERNEL);
	if (!cp) return NULL;
	pvr2_trace(PVR2_TRACE_STRUCT,"pvr2_ioread_create id=%p",cp);
	if (pvr2_ioread_init(cp) < 0) {
		kfree(cp);
		return NULL;
	}
	return cp;
}

void pvr2_ioread_destroy(struct pvr2_ioread *cp)
{
	if (!cp) return;
	pvr2_ioread_done(cp);
	pvr2_trace(PVR2_TRACE_STRUCT,"pvr2_ioread_destroy id=%p",cp);
	if (cp->sync_key_ptr) {
		kfree(cp->sync_key_ptr);
		cp->sync_key_ptr = NULL;
	}
	kfree(cp);
}

void pvr2_ioread_set_sync_key(struct pvr2_ioread *cp,
			      const char *sync_key_ptr,
			      unsigned int sync_key_len)
{
	if (!cp) return;

	if (!sync_key_ptr) sync_key_len = 0;
	if ((sync_key_len == cp->sync_key_len) &&
	    ((!sync_key_len) ||
	     (!memcmp(sync_key_ptr,cp->sync_key_ptr,sync_key_len)))) return;

	if (sync_key_len != cp->sync_key_len) {
		if (cp->sync_key_ptr) {
			kfree(cp->sync_key_ptr);
			cp->sync_key_ptr = NULL;
		}
		cp->sync_key_len = 0;
		if (sync_key_len) {
			cp->sync_key_ptr = kmalloc(sync_key_len,GFP_KERNEL);
			if (cp->sync_key_ptr) {
				cp->sync_key_len = sync_key_len;
			}
		}
	}
	if (!cp->sync_key_len) return;
	memcpy(cp->sync_key_ptr,sync_key_ptr,cp->sync_key_len);
}

static void pvr2_ioread_stop(struct pvr2_ioread *cp)
{
	if (!(cp->enabled)) return;
	pvr2_trace(PVR2_TRACE_START_STOP,
		   "/*---TRACE_READ---*/ pvr2_ioread_stop id=%p",cp);
	pvr2_stream_kill(cp->stream);
	cp->c_buf = NULL;
	cp->c_data_ptr = NULL;
	cp->c_data_len = 0;
	cp->c_data_offs = 0;
	cp->enabled = 0;
	cp->stream_running = 0;
	cp->spigot_open = 0;
	if (cp->sync_state) {
		pvr2_trace(PVR2_TRACE_DATA_FLOW,
			   "/*---TRACE_READ---*/ sync_state <== 0");
		cp->sync_state = 0;
	}
}

static int pvr2_ioread_start(struct pvr2_ioread *cp)
{
	int stat;
	struct pvr2_buffer *bp;
	if (cp->enabled) return 0;
	if (!(cp->stream)) return 0;
	pvr2_trace(PVR2_TRACE_START_STOP,
		   "/*---TRACE_READ---*/ pvr2_ioread_start id=%p",cp);
	while ((bp = pvr2_stream_get_idle_buffer(cp->stream)) != NULL) {
		stat = pvr2_buffer_queue(bp);
		if (stat < 0) {
			pvr2_trace(PVR2_TRACE_DATA_FLOW,
				   "/*---TRACE_READ---*/"
				   " pvr2_ioread_start id=%p"
				   " error=%d",
				   cp,stat);
			pvr2_ioread_stop(cp);
			return stat;
		}
	}
	cp->enabled = !0;
	cp->c_buf = NULL;
	cp->c_data_ptr = NULL;
	cp->c_data_len = 0;
	cp->c_data_offs = 0;
	cp->stream_running = 0;
	if (cp->sync_key_len) {
		pvr2_trace(PVR2_TRACE_DATA_FLOW,
			   "/*---TRACE_READ---*/ sync_state <== 1");
		cp->sync_state = 1;
		cp->sync_trashed_count = 0;
		cp->sync_buf_offs = 0;
	}
	cp->spigot_open = 0;
	return 0;
}

struct pvr2_stream *pvr2_ioread_get_stream(struct pvr2_ioread *cp)
{
	return cp->stream;
}

int pvr2_ioread_setup(struct pvr2_ioread *cp,struct pvr2_stream *sp)
{
	int ret;
	unsigned int idx;
	struct pvr2_buffer *bp;

	mutex_lock(&cp->mutex); do {
		if (cp->stream) {
			pvr2_trace(PVR2_TRACE_START_STOP,
				   "/*---TRACE_READ---*/"
				   " pvr2_ioread_setup (tear-down) id=%p",cp);
			pvr2_ioread_stop(cp);
			pvr2_stream_kill(cp->stream);
			if (pvr2_stream_get_buffer_count(cp->stream)) {
				pvr2_stream_set_buffer_count(cp->stream,0);
			}
			cp->stream = NULL;
		}
		if (sp) {
			pvr2_trace(PVR2_TRACE_START_STOP,
				   "/*---TRACE_READ---*/"
				   " pvr2_ioread_setup (setup) id=%p",cp);
			pvr2_stream_kill(sp);
			ret = pvr2_stream_set_buffer_count(sp,BUFFER_COUNT);
			if (ret < 0) {
				mutex_unlock(&cp->mutex);
				return ret;
			}
			for (idx = 0; idx < BUFFER_COUNT; idx++) {
				bp = pvr2_stream_get_buffer(sp,idx);
				pvr2_buffer_set_buffer(bp,
						       cp->buffer_storage[idx],
						       BUFFER_SIZE);
			}
			cp->stream = sp;
		}
	} while (0); mutex_unlock(&cp->mutex);

	return 0;
}

int pvr2_ioread_set_enabled(struct pvr2_ioread *cp,int fl)
{
	int ret = 0;
	if ((!fl) == (!(cp->enabled))) return ret;

	mutex_lock(&cp->mutex); do {
		if (fl) {
			ret = pvr2_ioread_start(cp);
		} else {
			pvr2_ioread_stop(cp);
		}
	} while (0); mutex_unlock(&cp->mutex);
	return ret;
}

#if 0
int pvr2_ioread_get_enabled(struct pvr2_ioread *cp)
{
	return cp->enabled != 0;
}

#endif  /*  0  */
static int pvr2_ioread_get_buffer(struct pvr2_ioread *cp)
{
	int stat;

	while (cp->c_data_len <= cp->c_data_offs) {
		if (cp->c_buf) {
			// Flush out current buffer first.
			stat = pvr2_buffer_queue(cp->c_buf);
			if (stat < 0) {
				// Streaming error...
				pvr2_trace(PVR2_TRACE_DATA_FLOW,
					   "/*---TRACE_READ---*/"
					   " pvr2_ioread_read id=%p"
					   " queue_error=%d",
					   cp,stat);
				pvr2_ioread_stop(cp);
				return 0;
			}
			cp->c_buf = NULL;
			cp->c_data_ptr = NULL;
			cp->c_data_len = 0;
			cp->c_data_offs = 0;
		}
		// Now get a freshly filled buffer.
		cp->c_buf = pvr2_stream_get_ready_buffer(cp->stream);
		if (!cp->c_buf) break; // Nothing ready; done.
		cp->c_data_len = pvr2_buffer_get_count(cp->c_buf);
		if (!cp->c_data_len) {
			// Nothing transferred.  Was there an error?
			stat = pvr2_buffer_get_status(cp->c_buf);
			if (stat < 0) {
				// Streaming error...
				pvr2_trace(PVR2_TRACE_DATA_FLOW,
					   "/*---TRACE_READ---*/"
					   " pvr2_ioread_read id=%p"
					   " buffer_error=%d",
					   cp,stat);
				pvr2_ioread_stop(cp);
				// Give up.
				return 0;
			}
			// Start over...
			continue;
		}
		cp->c_data_offs = 0;
		cp->c_data_ptr = cp->buffer_storage[
			pvr2_buffer_get_id(cp->c_buf)];
	}
	return !0;
}

Example #3

File: pvrusb2-ioread.c Project: forgivemyheart/linux

static int pvr2_ioread_start(struct pvr2_ioread *cp)
{
	int stat;
	struct pvr2_buffer *bp;
	if (cp->enabled) return 0;
	if (!(cp->stream)) return 0;
	pvr2_trace(PVR2_TRACE_START_STOP,
		   "/*---TRACE_READ---*/ pvr2_ioread_start id=%p",cp);
	while ((bp = pvr2_stream_get_idle_buffer(cp->stream)) != NULL) {
		stat = pvr2_buffer_queue(bp);
		if (stat < 0) {
			pvr2_trace(PVR2_TRACE_DATA_FLOW,
				   "/*---TRACE_READ---*/ pvr2_ioread_start id=%p error=%d",
				   cp,stat);
			pvr2_ioread_stop(cp);
			return stat;
		}
	}
	cp->enabled = !0;
	cp->c_buf = NULL;
	cp->c_data_ptr = NULL;
	cp->c_data_len = 0;
	cp->c_data_offs = 0;
	cp->stream_running = 0;
	if (cp->sync_key_len) {
		pvr2_trace(PVR2_TRACE_DATA_FLOW,
			   "/*---TRACE_READ---*/ sync_state <== 1");
		cp->sync_state = 1;
		cp->sync_trashed_count = 0;
		cp->sync_buf_offs = 0;
	}
	cp->spigot_open = 0;
	return 0;
}

Example #4

int pvr2_ioread_set_enabled(struct pvr2_ioread *cp,int fl)
{
	int ret = 0;
	if ((!fl) == (!(cp->enabled))) return ret;

	mutex_lock(&cp->mutex); do {
		if (fl) {
			ret = pvr2_ioread_start(cp);
		} else {
			pvr2_ioread_stop(cp);
		}
	} while (0); mutex_unlock(&cp->mutex);
	return ret;
}

Example #5

File: pvrusb2-ioread.c Project: forgivemyheart/linux

int pvr2_ioread_setup(struct pvr2_ioread *cp,struct pvr2_stream *sp)
{
	int ret;
	unsigned int idx;
	struct pvr2_buffer *bp;

	mutex_lock(&cp->mutex);
	do {
		if (cp->stream) {
			pvr2_trace(PVR2_TRACE_START_STOP,
				   "/*---TRACE_READ---*/ pvr2_ioread_setup (tear-down) id=%p",
				   cp);
			pvr2_ioread_stop(cp);
			pvr2_stream_kill(cp->stream);
			if (pvr2_stream_get_buffer_count(cp->stream)) {
				pvr2_stream_set_buffer_count(cp->stream,0);
			}
			cp->stream = NULL;
		}
		if (sp) {
			pvr2_trace(PVR2_TRACE_START_STOP,
				   "/*---TRACE_READ---*/ pvr2_ioread_setup (setup) id=%p",
				   cp);
			pvr2_stream_kill(sp);
			ret = pvr2_stream_set_buffer_count(sp,BUFFER_COUNT);
			if (ret < 0) {
				mutex_unlock(&cp->mutex);
				return ret;
			}
			for (idx = 0; idx < BUFFER_COUNT; idx++) {
				bp = pvr2_stream_get_buffer(sp,idx);
				pvr2_buffer_set_buffer(bp,
						       cp->buffer_storage[idx],
						       BUFFER_SIZE);
			}
			cp->stream = sp;
		}
	} while (0);
	mutex_unlock(&cp->mutex);

	return 0;
}